Safety mechanism for firearms.



G. HAMMOND. SAFETY MECHANISM FOR FIREARMS.

APPLICATION FILED JULY 16, 1913.

1312,21, Patented Jan. 26, 1915.

I froze/MK GRANT HOND, OF HARTFORD, CONNECTICUT, ASSIGNOB OF ONE-THIRD TO ALVA C. WASHIBUBNE, OF PITTSFIELD, MASSACHUSETTS, AND ONE THIRD TO FREDERICK G.

CRANE, E DALTON, MASSACHUSETTS.

SAFETY MECHANISM FOR FIREARMS.

Specification of Letters Patent.

Patented Jan 218, i215.

@rlglnal application filed October 25, 1912, Serial No. 727,894. Divided and this application filed July It,

' 1913. Serial No. 779,270.

To all whom it may concern:

Be it known that 1, GRANT HAMMOND, a citizen of the United States, and a resident of Hartford, in the county of Hartford and State of Connecticut, have invented a new and Improved Safety Mechanism for Firearms, or which the following is a specification.

My invention relates more particularly to devices for preventing the accidental and unintentional discharge of firearms, more especially of the automatic type, and an object of my invention, amongothers, is to provide a device of this class, simple in construction and that shall eflectually periormthe operations required of it.

One form of mechanism embodying my invention and in the construction and use of which the objects herein set out, as well as others, may he attained, is illustrated in the accompanying drawings, in which- Figure 1 is a view in side elevation of a pistol embodying my invention, with parts broken out as denoted by dotted line 11 of Fig. 2. Fig. 2 is a front view, with parts broken out as denoted by dotted line 2-2 of Fig. 1 to show construction, a part also being broken out back of said line to show the upper end of the safety bar. Fig. 3 is a side view of a portion of my improved pistol with parts broken away to show construction.

1n the accompanying drawings the numeral 5 denotes the handle, 6 the trigger guard, the trigger, and 8 the barrel of a pistol embodying my invention. The back edge piece of the handle has a hammer recess 10 opening out of the magazine chamber 11 within which the magazine 12 is lo cated, this hammer recess opening through to the back edge of the handle. hammer 13 is .pivotally mounted in this recess in the usual manner and is operated by a hammer spring 14 in a well lmown way.

A sear 15 is pivotally mounted within the recess 10 and has a scar tail 16 projecting laterally through the wall of the hammer recess 10 into a trip recess 17 formed in the handle. The hammer is milled out on one side forming adepression 18 having a stop shoulder 19 against which. a safety bar 20 rests. This safety bar is mounted beside the sear 15 and has a sliding movement longitudinally of the handle, riding on the scar and on the depressed portion of the hammer, so that it may be enga ed with the stop shoulder 19, or disengage therefrom. The upper end of the safety bar rests in a slot in a receiver 21 constituting a part of the frame and to which the barrel 1s secured. safety bar tail 22 also projects'through the wall of the hammer recess into the trip recess 17. A sear spring23 located in a hole in the back edge piece 9 forces the sear normally into engagement with the notches in the hammer, and a safety bar spring 24 forces the safety bar upward to normally engage the stop shoulder 19.

A tripping rod 25 projects through the wall of the ard 6, resting in contact with the trigger Within the handle the tripping rod curves toward one side to avoid the magazine, and then passes along the side of the magazme, its end being formed into a trip 26 located inthe trip recess 17. This.

it will, therefore, be impossible to transmit any blow, from the hammer to the firing pin, and thus accidentally discharge the pistol. Likewise in pulling the hammer backward, should it accidentally slip from the clasp of the thumb the pistol will not be discharged, as the safety bar will prevent the force of the hammer from being transmitted to the firing pin.

In operation, the hammer being cooked in the usual manner, pressure upon the trigger 7 is transmitted through the tripping -qbar cam' 28, acts against thesafety lid rod to the sear 15 and safety bar 20. In a connection between the trigger and said this movement of the tripping rod the safety safety bar for operating the latter.

bar-tail, moving the. safety bar downward from-.511 from .of thr shoulder 19 on the hammer. At the same time the sear shoulthesear, tail 16 forces the shat from, is, 'ga

cred from" in front of the shoulder 19 before disengagement of the sear, from the hammer notch'. During backward mevsmea sidestep-P a he ri cam '29, acting hgamsti'the projection formed by the? wall efthe trip reeesr17,:-"mores the'tr pping rod downward,.disenga*gin'g the V sear tail le'from thesear shoulder 27, this 'fastermovement to the safety bar than to did "'after tlie hammer has beenthrown forward, so that the-sear is now free to swing backward underthe infiuenee of its spring to reengage a notch in the hammer as the latter is: automaticall movement of t e breech bolt, this, action preventing doubling.

\ It will be noted that the simultaneous ac- .tionof the two cams 28 and 29 imparts a the tripping'rod, the operation above described'releasing the hammer that is forced forward by itsspring in the usual manner to fire the pistol.

- e'l have shown and described herein "a preferred form of 'mechanismfor accom 'lishing the resultsdesired by me, this may e changed to a greater or lesser degree and spirit andintent of the.

yet be within the invention, Y. t

The invention forming the subject matter of this application was originally included in my co-pehding application of Ser. No. 727,694, filed October 25th, 1912.

I: claim:

l. A firing mechanism for a firearm including a hammer, a safety bar to engage with the hammer to prevent its forward movement, asear in engagement with the hammer, a member movably mounted and having a cam surface engaging-the safety bar to disengage it from the hammer, a shoulder engaging the sear to disengage it from the hammer, and means for disengaging said member from the sear,

2. A firing mechanism for a firearm including a hammer, a safety bar to engage the hammer, a scar engaging the hammer, a member movably mounted and having a cam surface engaging said safety bar, a shoulder engaging said scar, and a cam surface engaging a projection to disengage said member vfrom said sear.

3.' A firing mechanism for a firearm includinga hammer cut-away on one side providing a depression forming a shoulder, a safety bar located in said depression in position to engage said shoulder, a trigger, and

s 'emeiitwith a notch in the hammer,thesai'etybar, howevei", being lowcocked in the backward eluding 4. A firing mechanism for a firearm including a hammer cut-away on one side providing -'adepression forming a shoulder, a safety bar located in said depression to engage said shoulder to hold the hammer against movement, a scar, a tri'gger,-'and a connection between the trigger andsear and f iafety bar for operating the two latter memrs 4 5 A' firing'inechaniSmQ for a firearm including a hammer, a safety bar, a member. to actuate the safety bar, said member having a plural number of cam surfaces cooperating to achelerate movement. of the safety bar,

and cam surfaces positioned to coact with t those on said member.

'- 6.;A firing mechanism for a firearm injeludihg 'a hammer, a safety ban to engage the hammer, and a sliding member having a cam surface engaging the safety bar and a cam surface engaging a stationary cam surface, the two camsurfaces on said sliding member coactingto accelerate the movement of the safety bar.

7. A. firing mechanism for a firearm including a hammer, a'safety bar to engage the hammer, a'trip member having a cam surface to engage said bar-and a second cam v surface to engage a stationary part of the .frame, said cam surfaces coactin 'erate the movement of the safety ar, and a to acceltrigger to engage said trip member.

8. A firingm'echanism for a firearm including a hammer, a scar to engage the hammer, a safety bar, a longitudinally movable trip member having a cam surface to slidably engage the safety bar and a shoulder to engage said sear, and means for operating the trip member.

9. A firing mechanism for a firearm inarhammer, a sear to engage the hammer, a safety bar to engage the hammer, a tail projecting'from the safety bar, a tail projecting from the sear, a trip, actuatmg member located between said tails and having a camsurface to engage that on the safety bar,and means for operating the trip member.

10 A firing mechanism for a firearm inhammer, a safety bar, a tail projecting from the sear, a tail projecting from the safetg bar, a trip member located between said tai and having a cam surface to engage the tail eluding a hammer, a sear to engage the on'the safety bar, means to engage the tail on the sear, said trip member also having a cam surface to engage a stationary part of the frame of the firearm, and means for operating the trip member, said cam surfaces coacting to accelerate the movement of the safety bar.

11. A firing mechanism for a firearm including a hammer, a pivotally mounted; sear memes to engage the hammer, a. safety bar hevin a, and seer, end means for operating the safety sliding movement against the side of t e member.

sear, a tail projecting from the sear, a tail projecting from the safety bar, a trip mem- GRANT HARMOND 5 her located between said tails and having Witnesses:

cam surfaces to engage the safety her and a. ARTHUR B. Jmzms,

part of the frame to operate the safety bar A. E. QBRIE N. 

